Why are so many versions of same two tasks?

Hello.

I have two identical tasks in my project with fixed duration 7 day and 0 work assigned to one resource (marked as milestone) and have identical predessesor.

Why I have so many versions of same two tasks?

In pub table first task start 2022-08-17 18:00:00.000 and finish 2022-08-17 18:00:00.000 and duration 7 day.

In pub table second task start 2022-08-17 18:00:00.000 and finish 2022-08-26 18:00:00.000 and duration 7 day.

In PWA is the same as in pub table.

In Project Professional 2016 in project public version:

first task start 2022-08-17 18:00:00.000 and finish 2022-08-17 18:00:00.000 and duration 0 day,

the second task start 2022-08-17 18:00:00.000 and finish 2022-08-17 18:00:00.000 and duration 0 day.

(Project Professional 2016 April 5, 2022
SharePoint 2019 June 2022 CU)